Hyperdimension Neptunia mk2 is rated “Mature” by the ESRB. The first game was rated “Teen”. Why the difference? This rating summary should explain it all:

This is a role-playing game in which players control a young goddess on a quest to rescue her sister from an evil organization. As players advance the storyline, they use swords, lances, over-sized syringes, and colorful light attacks to engage in turn-based combat against fantasy creatures (e.g., slime monsters, dragons, robots); damage is indicated by impact sounds and a loss of hit points. Some female characters are dressed in low-cut outfits that expose large amounts of cleavage or buttocks.

A variety of scenes depict a supernatural villain who harasses female characters and makes sexually suggestive comments (e.g., “Come, come and sit on daddy’s lap. We’ll have fun exploring each other,” “You can be a cunning linguist, my dear,” “I’m dying to leer at her longingly,” and “Mmmm, the height of ecstasy, licking a nubile maiden’s wounds!”/“No, hey stop . . . I said stop it!”)—accompanying licking sounds can be heard off screen. In one sequence, a character moans as she is massaged by another woman; suggestive dialogue can be heard throughout (e.g., “Don’t carry any of those impure thoughts,” “Ahh, I’m so sensitive to this . . . Ahhhahahahaha! I can’t take it anymore!”). The words “sh*t” and “b*tch” also appear in dialogue.